Can anyone help me with my computer networks homework? Compare and contrast the IPv4 and IPv6. Do they have any header in common? We know one of the approaches for the coexistence of IPv6 and IPv4 is tunneling. With this approach, is it correct to state that IPv6 treats the IPv4 tunnels as link-layer protocols? Thanks, guys!

Alright guys. New question.
We talked about the 128-byte nonce used in WEP authentication protocol and the possibility of replay attack. In practice, how the nonce can be generated to defend against such an attack?
Please help quick. This homework is due Friday!